What is the central theme introduced in Chapter 15, and what analogy is used to illustrate it?

Chapter 15 introduces the theme of how Sai Baba responds to the prayers of His loving devotees, granting them His vision when they approach Him with sincere affection. The chapter uses a detailed analogy to illustrate this dynamic. As described in Chapter 15, the relationship is compared to that of a mother cat and her kittens. The kittens persistently run to their mother for nourishment, and even if she initially seems annoyed and growls, their loving persistence causes her to relent, forget her annoyance, and lovingly spread herself on the ground to nurse them. This beautifully illustrates how a devotee's persistent love can elicit divine grace.